CVE-2024-42241

Kernel service interruption via unsupported page-cache split

Published Aug 7, 2024 · Updated May 11, 2026

Improper page-cache handling in Linux allows local users to interrupt service through shmem operations on affected ARM64 systems. The mm/shmem code enables PMD-sized page cache when HPAGE_PMD_ORDER exceeds MAX_PAGECACHE_ORDER, leaving xarray unable to split the entry. The demonstrated path requires an ARM64 kernel with 64 KB base pages and a later shmem split, producing xarray errors and a kernel warning.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper page-cache handling in Linux allows local users to interrupt service through shmem operations on affected ARM64 systems. The mm/shmem code enables PMD-sized page cache when HPAGE_PMD_ORDER exceeds MAX_PAGECACHE_ORDER, leaving xarray unable to split the entry. The demonstrated path requires an ARM64 kernel with 64 KB base pages and a later shmem split, producing xarray errors and a kernel warning.

The record

CVE
CVE-2024-42241
Published
Aug 7, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-770, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 7, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.17
  2. Affected versionversion=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <93893eacb372b0a4a30f7de6609b08c3ba6c4fd9
  3. Affected versionversion=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <9fd154ba926b34c833b7bfc4c14ee2e931b3d743
  4. Affected versionversion=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <cd25208ca9b0097f8e079d692fc678f36fdbc3f9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <93893eacb372b0a4a30f7de6609b08c3ba6c4fd9; version=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <9fd154ba926b34c833b7bfc4c14ee2e931b3d743; version=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <cd25208ca9b0097f8e079d692fc678f36fdbc3f9

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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